We have covered plenty of tiny drones here in the past. The Bub Drone is one of the smallest FPV quadcopters around. It has a 720p camera and lets you control it from your smartphone or tablet. Bub can rotate and flip 360 degrees. You can adjust its speed conveniently.
Bub is compatible with iOS and Android devices. It has flexible, replaceable propellers. The battery life lasts up to 10 minutes. More information is available on Indiegogo.